JPS60196258A - Production of razor blade - Google Patents

Abstract

PURPOSE:To provide a razor blade having excellent strength and corrosion resistance by producing amorphous thin pieces with clipping by pressing and rapid- cooling of a dropwise feeding molten metal between a pair of molds having respectively symmetrical projected part and recessed part, then by cutting-off the projected part to make an opening part for introduction of whiskers. CONSTITUTION:A respectively symmetrical anvil die 5 and piston die 4 have a projected part 6 and recessed part 7. A dropwise feeding molten metal drop 8 is detected by a photoelectric tube 3 and the drop 8 is clipped with pressing and cooled rapidly with quick movement of the dies 4, 5. The drop 8 is made a thin plate 9 having amorphous recess and projection by being cooled rapidly. By cutting-off the projected part 10 by proper means, it makes an opening part 11 for whiskers introduction. Instantaneously after the drip, the amorphous thin plate 9 is made to make a razor blade excellent in strength and corrosion resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a method for manufacturing razor blades using an amorphous alloy.

[Background technology]

In general, amorphous alloys have no crystals, have lower elasticity and stiffness than crystalline materials, and have excellent strength and corrosion resistance, so various uses are being considered.

However, the single-roll method, which is a typical manufacturing method for conventional amorphous materials, can only produce thin strips with a thickness of about 30/+m and in the form of a flat plate. Required further processing.

At this time, since amorphous alloys do not undergo plastic deformation even when pressed at room temperature, various methods of applying heat have been proposed (for example, JP-A-57-521222).

However, this method required complicated temperature and time control and was prone to brittle deterioration.

On the other hand, stainless steel alloy (SUS4020J2) has traditionally been used as the outer blade for electric razors, but there was a limit in terms of strength in order to increase the opening ratio and reduce the blade thickness in pursuit of a close shave of 9. . Furthermore, there was a problem in terms of corrosion resistance when washed with water.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a thin razor blade with high hardness and excellent corrosion resistance and strength.

[Disclosure of the invention]

The method for manufacturing razor blades of the present invention involves sandwiching molten metal between a pair of molds each having corresponding convex portions and concave portions, and rapidly cooling the metal to form an amorphous uneven flake. It is characterized by being cut out to form an opening for introducing the whiskers.

The piston-anovil method is known as one of the methods for manufacturing amorphous alloys. This involves sandwiching the molten alloy between two flat metal plates and rapidly cooling it. According to this method, a thin plate of irregular shape is obtained.

The method of this invention involves providing a pair of flat plates (piston and anvil) with corresponding convex portions and four portions to form a male mold and a female mold, and inserting the entire molten alloy between these molds and sandwiching the mold to ultra-quickly cool it. Second, a thin piece of amorphous alloy having an uneven surface is obtained.

An outer cutter for an electric shaver can be obtained by cutting the thus-produced amorphous uneven flake into the outer shape of an outer cutter for a razor, and removing the protrusions by polishing or other means to provide an opening for introducing sink marks. can.

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

FIG. 1 shows an apparatus for producing uneven flakes of amorphous alloy. In FIG. 1, 1 is an electric furnace, 2 is a shutter, 3 is a photoelectric switch, 4 is a piston, and 5 is an anvil.

The piston 4 and the anobile 5 are provided with corresponding protrusions 6 and recesses 7 on their opposing surfaces. The molten metal 8 is dropped in an electric furnace 1 between a piston 4 and an anvil 5, and the piston 4 is driven to sandwich the molten metal 8 between it and the anvil 5 and rapidly cool it.

The amorphous alloy flake thus obtained is in the form of a thin plate having an uneven surface, as shown in FIG. Next, by cutting out the convex portion 1o of this thin piece 9, the third
Outer blade 1 for razor blades with an opening 11 formed as shown in the figure
2 was obtained.

〔Effect of the invention〕

According to this invention, the process of producing an amorphous flake using a conventional single roll method or the like and then performing pressing or the like to obtain an uneven flake can form an uneven surface at the same time as the production of the amorphous flake. Since there is no need to add and press, there is no deterioration in strength or brittleness due to heating, and therefore it is possible to produce a thin razor blade with excellent strength and corrosion resistance.

[Brief explanation of drawings]

FIG. 1 is a non-BA view of the manufacturing apparatus used in the embodiment of this invention, FIG. 2 is a perspective view of the uneven thin piece produced, and FIG.
The figure is a perspective view of the obtained razor blade. 4...-piston (mold), 5... anvil (mold), 6
... Convex portion, 7... Concave portion, 8... Molten metal, 9
... thin piece 10 ... convex part, 11 ... opening, 12.
Outside blade for Rigamisoshi 1 - Agent Patent attorney Akira Miyai 1 - Me Fig. 1 Fig. 3 Procedural master's official document (Self-motivated patent application filed on July 6, 1980) No. 049874 2, Name of the invention Method for manufacturing razor blades 3, Person making the amendment Relationship to the case Applicant 4, Agent 5, Date of amendment order Voluntary amendment

Claims (1)

[Claims] The molten metal is sandwiched between a pair of molds each having corresponding convex portions and four parts, and is rapidly cooled to form an amorphous uneven flake.Then, the convex portion of this uneven flake is cut out to form an opening for introducing sink marks. A method for manufacturing a razor blade, characterized by: